Chapter 3 Laser Diode Driver Operation 29
3.5.3.11 Vf Loss
Vf Loss
allows for compensation of voltage loss in the output cable. In
applications where small gauge wire is used, current can cause a measurable
loss in voltage across the cable. By measuring the voltage directly at the
diode and comparing the difference of the displayed voltage reading, an error
factor can be calculated and entered as the Vf loss. Note, however, that the
Vf loss value does
not
affect the Vcomp setting. Voltage compliance settings
must include any loss in the cable.
3.5.3.12 Pulse Enable
Enables/Disables QCW mode.
3.5.3.13 Pulse Width
Adjusts the pulse width.
3.5.3.14 Pulse Rate
Adjusts the pulse rate.
3.5.3.15 Duty Cycle
A calculated value based on width and rate.
3.5.3.16 PD Resp
The
Resp
element is the photodiode response conversion factor between
photodiode current and photodiode power, and is expressed in
µ
A per mW.
If this value is zero, the system will not operate in
Po
mode.
3.5.3.17 PD Zero
The
PD Zero
element is the photodiode offset that is removed from the
photodiode read back before any values are displayed, and conversely, is
added to any photodiode set point. The photodiode offset is a combination of
any dark current or stray light picked up while the laser is off. Pressing the
PD Zero
soft button sets the photodiode current that is present on the
photodiode input.
3.5.4 Modulation Setup Menu
The modulation setup menu for the Model 5600 is shown in Figure 11 and
described in detail below.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
To Next Page
Loading...
